I love it when a plan comes together:
http://www.diystompboxes.com/smfforum/i ... ic=92232.0
"I'm planning another uber-phaser, dubbed 'Gemini Dual Core'. At it's heart will be two Causality 6 phaser cores, the magic will be in how they are configured. Part of the concept is inspired by the ol' Bi-Phase - two phaser cores in parallel, either of which can be switched in or out, with the dry path 'always on' - which will require the pedal to be non true bypass. I've also worked out the switching options so the two phaser cores can be either in series or in parallel. As well as the option to run both phaser cores from just one LFO, or for each to have their own dedicated LFO.
While allowing the ideas to ferment in my mind, it also occured to me that it might be interesting to run the two phaser cores in parallel - BUT - add a little inverter to the output of one LFO, so that phaser core #1 sees a normal version of the LFO while phase core #2 sees an inverted version. Then, cut the dry path. In my mind, I'm imagining that as one phaser core 'peaks' the other 'troughs', and therefore they are 'twice as far away from each other' as either one on it's own would be from the dry signal (were it present, which it wouldn't be). I'm hearing big phatt uber-sweeps in my head."Now I'm hearing phatt uber-sweeps in my music room.....

Basically, two Causality 6 phasers with extensive switching arrangements. The two phase cores can be run on their own, or in series, or in parallel. Phase Core #2 can be synced to Phase Core #1's LFO. Best of all, the LFO sync switching includes an inverter, so Phase Core #2 can be swept inverse to Phase Core #1. You guys have to hear this one!
I'll be releasing this as a project once I get my documentation up to date - this prototype includes a number of ugly cludges to the PCB which I'll smooth out for the published project.
Gut shot - it's ugly in there! It's a complex pedal anyway, but leaving the wiring deliberately long for modding, together with the ugly cludges make it gut-shot-hell!

Gemini will soon be available for you to purchase via my website......